| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <stdlib.h> |
| #include <stdint.h> |
| |
| #include <minikin/AnalyzeStyle.h> |
| |
| namespace android { |
| |
| // should we have a single FontAnalyzer class this stuff lives in, to avoid dup? |
| static int32_t readU16(const uint8_t* data, size_t offset) { |
| return data[offset] << 8 | data[offset + 1]; |
| } |
| |
| bool analyzeStyle(const uint8_t* os2_data, size_t os2_size, int* weight, bool* italic) { |
| const size_t kUsWeightClassOffset = 4; |
| const size_t kFsSelectionOffset = 62; |
| const uint16_t kItalicFlag = (1 << 0); |
| if (os2_size < kFsSelectionOffset + 2) { |
| return false; |
| } |
| uint16_t weightClass = readU16(os2_data, kUsWeightClassOffset); |
| *weight = weightClass / 100; |
| uint16_t fsSelection = readU16(os2_data, kFsSelectionOffset); |
| *italic = (fsSelection & kItalicFlag) != 0; |
| return true; |
| } |
| |
| } // namespace android |